[time-nuts] State of the art of crystal oscillator measurements
KA2WEU at aol.com
KA2WEU at aol.com
Thu Aug 11 17:37:04 EDT 2016
NO, the maximum possible noise dynamic range is ( 177 + Pout) [dBm] -
Transistor large signal NF ( dB),
the signal to noise ration is dimensionless !!!!
In a message dated 8/11/2016 5:00:43 P.M. Eastern Daylight Time,
john at miles.io writes:
Or rather -(177+DUT output power in dBm). The minus sign makes the
difference between the thermal floor and a nuclear war!
-- john, KE5FX
Miles Design LLC
> Remember that L(f) is expressed in dBc/Hz, not dBm/Hz. If it were
dBm/Hz,
> then kT would be the limit. But in dBc/Hz terms, the limit is 177 + the
DUT's
> output power in dBm.
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